Your story is great, but unless you get in for athletics/do incredibly well on the SAT, C’s might put an Ivy out of reach. There are plenty of other schools that won’t disregard you for a lower GPA, but because of the thousands of highly qualified applicants Ivies receive, your GPA might become an eliminating factor for them. Don’t set your mind on the Ivy League - chances are you’ll be happy wherever you go, and you will get in somewhere else great. Good luck!!
(chance back?? http://talk.qa.collegeconfidential.com/what-my-chances/1751707-chances-for-yale-tufts-wesleyan.html?new=1 )